aiot-hardware-imu

Firmware Basic information

• Serila port Speed : 500kbps
• UUID : 14A168D7-04D1-6C4F-7E53-F2E800B11900
• Sytem Read IMU : 20ms
• BLE IMU Transmit : 20ms
• Battery Charging Current : 100uA
• Time Sync feature

Copy libary to your Arduino libaraies

user-path\Arduino\libraries

Navigate to File > Preferences, and fill "Additional Boards Manager URLs" with the url below:

https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json

Arduino Configuration

• Board Configuration [ Tools > Board > Boards Manager..]

  • Selected Seeed nRF52 mebd-enabled Boards
    • Search seeed nrf52

• Arduino Libraries [Tools > Manage Libraries…]

  • Install ArduinoBLE

  • Install Seeed Arduino LSM6DS3

  • Install Timelib

  • Install Seed Aruino Mic (From GitHub)

    • Download zip file Library https://github.com/Seeed-Studio/Seeed_Arduino_Mic
    • Add .ZIP Library Seeed_Arduino_Mic-master.zip

  • Install Xiao NRF52840 Battery

    • The head file have to modified as below

      1. Remove bluefruit.h
      2. Add Pin define
         1. #define VBAT_ENABLE P0_14
         2. #define PIN_VBAT P0_31

      Example as below

    #include <Arduino.h>
    // Removed 
    #define VBAT_ENABLE P0_14    // 
    #define PIN_VBAT P0_31
    
    #define BAT_HIGH_CHARGE 22  // HIGH for 50mA, LOW for 100mA
    #define BAT_CHARGE_STATE 23 // LOW for charging, HIGH not charging
    
    class Xiao {
    public:
      Xiao();
      float GetBatteryVoltage();
      bool IsChargingBattery();
    };
    
    Xiao::Xiao() {
      pinMode(VBAT_ENABLE, OUTPUT);
      pinMode(BAT_CHARGE_STATE, INPUT);
    
      digitalWrite(BAT_HIGH_CHARGE, HIGH); // charge with 50mA
    }
    
    #define VBAT_MV_PER_LBS (0.003395996F)
    
    float Xiao::GetBatteryVoltage() {
      digitalWrite(VBAT_ENABLE, LOW);
    
      uint32_t adcCount = analogRead(PIN_VBAT);
      float adcVoltage = adcCount * VBAT_MV_PER_LBS;
      float vBat = adcVoltage * (1510.0 / 510.0);
    
      digitalWrite(VBAT_ENABLE, HIGH);
    
      return vBat;
    }
    
    bool Xiao::IsChargingBattery() { return digitalRead(BAT_CHARGE_STATE) == LOW; }
    

GitHub

• https://github.com/Seeed-Studio/Seeed_Arduino_LSM6DS3
• https://github.com/Seeed-Studio/Seeed_Arduino_Mic
• https://github.com/arduino-libraries/ArduinoBLE
• https://github.com/PaulStoffregen/Time
• https://github.com/honvl/Seeed-Xiao-NRF52840-Battery